I can fit every book I own in my jacket pocket, read them whenever I want, wherever I want, annotate them, search them, lookup words in the middle of them, whatever I need to do.

Or I can buy a single book that takes up more room than my entire library combined. No thanks.

As far as DRM goes, people are going to pirate it, and I'm not. But I also don't want to pay money to get a worse, more limited experience than those who pirate it. If the DRM prevents me from doing things that would be trivial for a pirate, something has gone horribly wrong. Yet that's our standard now.